Global Influenza Programme
We provide Member States with strategic guidance, technical support and coordination of activities essential to make their health systems better prepared against seasonal, zoonotic and pandemic influenza threats to populations and individuals.
Zoonotic influenza: candidate vaccine viruses and potency testing reagents
Northern hemisphere influenza seasons
2025-2026
Southern hemisphere influenza seasons
2025
Previous seasons
2024-2025
2023-2024
2022-2023
| Title | Type | Size | |
| 1. A(H5N1) | 200 KB | Download | |
| 2. A(H5) non-A(H5N1) | 185 KB | Download | |
| 3. A(H7N9) | 207 KB | Download | |
| 4. A(H7) | 213 KB | Download | |
| 5. A(H9N2) | 212 KB | Download | |
| 6. A(H1) variant | 179 KB | Download | |
| 7. A(H3N2) variant | 179 KB | Download |
2022
| Title | Type | Size | |
| 1. A(H5N1) | 221 KB | Download | |
| 2. A(H5) non-A(H5N1) | 181 KB | Download | |
| 3. A(H7N9) | 207 KB | Download | |
| 4. A(H7) | 213 KB | Download | |
| 5. A(H9N2) | 211 KB | Download | |
| 6. A(H1) variant | 178 KB | Download | |
| 7. A(H3N2) variant | 179 KB | Download |
2021-2022
| Title | Type | Size | |
| 1. A(H5N1) | 280 KB | Download | |
| 2. A(H5) non-A(H5N1) | 175 KB | Download | |
| 3. A(H7N9) | 198 KB | Download | |
| 4. A(H7) | 203 KB | Download | |
| 5. A(H9N2) | 201 KB | Download | |
| 6. A(H1) variant | 167 KB | Download | |
| 7. A(H3N2) variant | 169 KB | Download |
2021
| Title | Type | Size | |
| 1. A(H5N1) | 214 KB | Download | |
| 2. A(H5) non-A(H5N1) | 174 KB | Download | |
| 3. A(H7N9) | 201 KB | Download | |
| 4. A(H7) | 205 KB | Download | |
| 5. A(H9N2) | 202 KB | Download | |
| 6. A(H1) variant | 222 KB | Download | |
| 7. A(H3N2) variant | 170 KB | Download |
2020-2021
| Title | Type | Size | |
| 1. A(H5N1) | 678 KB | Download | |
| 2. A(H5) non-A(H5N1) | 613 KB | Download | |
| 3. A(H7N9) | 660 KB | Download | |
| 4. A(H7) | 637 KB | Download | |
| 5. A(H9N2) | 629 KB | Download | |
| 6. A(H1) variant | 619 KB | Download | |
| 7. A(H3N2) variant | 599 KB | Download |
2020
| Title | Type | Size | |
| 1. A(H5N1) | 214 KB | Download | |
| 2. A(H5) non-A(H5N1) | 174 KB | Download | |
| 3. A(H7N9) | 201 KB | Download | |
| 4. A(H7) | 205 KB | Download | |
| 5. A(H9N2) | 202 KB | Download | |
| 6. A(H1) variant | 222 KB | Download | |
| 7. A(H3N2) variant | 170 KB | Download |
2019-2020
| Title | Type | Size | |
| 1. A(H5N1) | 552 KB | Download | |
| 2. A(H5) non-A(H5N1) | 603 KB | Download | |
| 3. A(H7N9) | 527 KB | Download | |
| 4. A(H7) | 621 KB | Download | |
| 5. A(H9N2) | 408 KB | Download | |
| 6. A(H1) variant | 596 KB | Download | |
| 7. A(H3N2) variant | 590 KB | Download |
2019
| Title | Type | Size | |
| 1. A(H5N1) | 205 KB | Download | |
| 2. A(H5) non-A(H5N1) | 169 KB | Download | |
| 3. A(H7N9) | 201 KB | Download | |
| 4. A(H7) | 205 KB | Download | |
| 5. A(H9N2) | 203 KB | Download | |
| 6. A(H1) variant | 633 KB | Download | |
| 7. A(H3N2) variant | 153 KB | Download |
2018-2019
| Title | Type | Size | |
| 1. A(H5N1) | 162 KB | Download | |
| 2. A(H5) non-A(H5N1) | 134 KB | Download | |
| 3. A(H7N9) | 576 KB | Download | |
| 4. A(H7) | 135 KB | Download | |
| 5. A(H9N2) | 132 KB | Download | |
| 6. A(H1) variant | 126 KB | Download | |
| 7. A(H3N2) variant | 107 KB | Download |
2018
| Title | Type | Size | |
| 1. A(H5N1) | 170 KB | Download | |
| 2. A(H5) non-A(H5N1) | 136 KB | Download | |
| 3. A(H7N9) | 144 KB | Download | |
| 4. A(H7) | 137 KB | Download | |
| 5. A(H9N2) | 157 KB | Download | |
| 6. A(H1) variant | 485 KB | Download | |
| 7. A(H3N2) variant | 108 KB | Download |
2017-2018
| Title | Type | Size | |
| 1. A(H5N1) | 103 KB | Download | |
| 2. A(H5) non-A(H5N1) | 103 KB | Download | |
| 3. A(H7N9) | 123 KB | Download |
2017
| Title | Type | Size | |
| 1. A(H5N1) | 171 KB | Download | |
| 2. A(H5) non-A(H5N1) | 106 KB | Download | |
| 3. A(H7N9) | 143 KB | Download | |
| 4. A(H7) | 149 KB | Download | |
| 5. A(H9N2) | 129 KB | Download | |
| 6. A(H1) variant | 106 KB | Download | |
| 7. A(H3N2) variant | 106 KB | Download |
2016-2017
| Title | Type | Size | |
| 1. A(H5N1) | 154 KB | Download | |
| 2. A(H5) non-A(H5N1) | 105 KB | Download | |
| 3. A(H7N9) | 121 KB | Download | |
| 4. A(H7) | 132 KB | Download | |
| 5. A(H9N2) | 130 KB | Download | |
| 6. A(H1) variant | 104 KB | Download | |
| 7. A(H3N2) variant | 104 KB | Download |
2016
| Title | Type | Size | |
| 1. A(H5N1) | 156 KB | Download | |
| 2. A(H5) non-A(H5N1) | 105 KB | Download | |
| 3. A(H1) variant | 105 KB | Download | |
| 4. A(H3N2) variant | 106 KB | Download |
2015-2016
| Title | Type | Size | |
| 1. A(H7N9) | 122 KB | Download |
2015
| Title | Type | Size | |
| 1. A(H5N1) | 242 KB | Download | |
| 2. A(H5) non-A(H5N1) | 162 KB | Download |
2014-2015
| Title | Type | Size | |
| 1. A(H5N1) | 152 KB | Download | |
| 2. A(H7N9) | 119 KB | Download | |
| 3. A(H9N2) | 107 KB | Download |
2014
| Title | Type | Size | |
| 1. A(H5N1) | 157 KB | Download | |
| 2. A(H7) | 132 KB | Download | |
| 3. A(H9N2) | 129 KB | Download |
2013-2014
| Title | Type | Size | |
| 1. A(H5N1) | 172 KB | Download | |
| 2. A(H7N9) | 127 KB | Download | |
| 3. A(H9N2) | 107 KB | Download | |
| 4. A(H3N2) variant | 106 KB | Download |
2013
| Title | Type | Size | |
| 1. A(H5N1) | 155 KB | Download | |
| 2. A(H7N9) | 133 KB | Download | |
| 3. A(H7) | 109 KB | Download |
2012-2013
| Title | Type | Size | |
| 1. A(H5N1) | 114 KB | Download | |
| 2. A(H9N2) | 88 KB | Download | |
| 3. A(H3N2) variant | 84 KB | Download |
2011-2012
| Title | Type | Size | |
| 1. A(H5N1) | 127 KB | Download | |
| 2. A(H3N2) variant | 103 KB | Download |
2011
| Title | Type | Size | |
| 1. A(H5N1) | 119 KB | Download | |
| 2. A(H9N2) | 90 KB | Download |
2010-2011
| Title | Type | Size | |
| 1. A(H5N1) | 76 KB | Download |
2010
| Title | Type | Size | |
| 1. A(H5N1) | 95 KB | Download |